I am currently trying to solve a problem with my farmall cub and would appreciate all the help i can get.The problem is that my cub will run fine will parked with no load on the motor but when i try to drive it lacks power and will stall on a slight hill even in first. I have recently clean the fuel tank and sediment bowl, installed a new carburetor and rebuilt the governor and re weird the hole tractor.

My first thoughts would be a fuel supply issue or slop in the governor-to-carb linkage.

When it starts to stumble, can you get it to run a bit better by closing the choke partially/fully? That would indicate a fuel restriction.You say you recently cleaned the tank and strainer. Does that include the inlet valve to the strainer? Did you clean the screen at the inlet to the carb? Did you clean the jet? It takes a very small amount of crud at any of these locations to restrict fuel supply.

If there is too much slop in the governor-to-carb linkage, the governor may be requesting a wider throttle, but the carb may not be getting the message to respond.

Did tractor work prior to this work? A more thorough history would help.

Put a timing light on it as well. Walt ran good but lacked power. I tuned it up etc. & still lacked power. Put the timing light on it and fine tuned the distributor and you would have thought you put a new engine in it from a 140. It wasn't off much but when you start out with not much then not much taken away from that leaves drippings.